Centrifugal apparatus for casting.



No. 648,60I. Patented May I, |900.

F. G. STRIDSBEBG. CENTRIFUGA'L APPARATUS-,FOB CASTING.

(Application' led June 17, 1898.) (No Model.) 2 Sheets-Sheet l'.

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No. 648,60I. Patented May I, |900.

F. G. STRIDSBERG.

GENTBIFUGAL APPARATUS FDR CASTING.

(Application led June 1'?, 189B.) (No Model.) 2 Sheets-Sheet 2.

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UNITED STATES PATENT EEICEs FRANS GUSTAF STRlDSBERG, OF STOCKHOLM, SVEDEN.

CENTRIFUGAL APPARATUS FIOR CAS'l-ING.

SPECIFICATION forming part of Letters Patent No. q6418,60 1, dated May 1, 1,900.

- Application filed Tune 1'7, 1898..

To all tall/0m it may-concern:

Be it known that I, FRANS GUSTAF STRIDS- BERG, engineer, a subject of the King of Sweden and Norway, and a resident of St. Eriks plan 2, Stockholm, in the Kingdom of Sweden, have invented certain new and useful Improvements in Centrifugal Apparatus for Making Hollow or Solid Ingots of'Metal, of which the following is a specification, reference being had therein to the accompanying drawings. F

This invention relates to an apparatus by means of which the known method of producing hollow cylindrical castings bythe aid of centrifugal force can be carried out in practice, the apparatus being more especially intended for use in making sound hollow in gots for the manufacture of tubes. l

' Figure 1 shows the apparatus in a vertical section, the centrifugal apparatus being seen in its vertical position, yand Fig. 3 the apparatus in a plan view. Fig. 2 represents an elevation of the apparatus; and Fig. 4 a view of it from one end, the driving arrangement being here left out. Fig. 5 is a planview on line 5 5 of Fig. 1. The apparatus consists of a casing a, in which are placed one or more vmolds c. The casing is suspended on gudgeons b in order to allow of tipping it, so as to bring the molds to occupy a vertical, horizontal, or inclined position. The-lower ends of the molds are joined by means of coupling-sleeves lo to driving-shafts fi, to which the power is transmitted by means of gearing or gear-wheels h from a common wheel g on a central shaft Z, which is also provided with a gear-wheelf. Vhen one mold only is employed, evidently no wheels g and h willrbe needed, the shaft Z being simply provided at its upper end with a coupling-sleeve 7c for receiving the mold. The motive power is transmitted to the centrifugal apparatus by bringing the drivingwheel f in contact with a similar drivingwheel d, d,or d,located in such positions with relation to the gudgeons b of the centrifugal apparatus that the ingot-molds will occupy the desired positions in each respective case. The driving-wheels d are mounted on shafts m, which are also provided with suitable means for receiving the motive power from a motor-as, for instance, belt-pulleys e, e', and

lthe bottom of the mold.

Serial No. 683,689. (No modelJ e", cranks, bevel-gears, or the like. Motorsfor instance, steam-turbines or electric motors-may alternatively be applied directly to the shafts fm., fm, and fm". The drivingwheels d and f are preferably made in the shape of friction-pulleys in order that power tion immediately on commencing the .pour-.

ymay be transmittedV from one to the other by 'l ing. 'When the molds have been allowed to V rotate at the `required velocity for a length of timethat is adequate to the treatment of the metal for producing avvhollow ingot, the driving-wheel f is by turning the apparatus disengaged from the wheel d and brought into engagement with thewheel d" or d" in order to facilitate a uniforml distribution of the metal atthe walls of lthe mold by bringing the latter in a different position and cause the ingot to retain its shape while solidifying. Owing to their inertia the molds continue their rotation while being turned from one vdriving position to the other; but their stored power is insufcient for keeping up their rotation for the desired length of time, and it is therefore necessary to supply the motive power until Lthe metal has solidified. The metal must bepoured into the molds while the latter are/in the vertical position in order kto preve the formation of flakes or spirals of cooled metal on the surface of the ingot. In pouring the upper surface of the metal will rise along the Walls of the mold, while in the said upper surface there forms a funnelshaped cavity which does not reach down to W'hen the mold is brought into the horizontal position,the metal can flow out and become distributed along the inner walls of the mold, so as to produce an ingot of uniform thickness of metal.

Having now described my invention, what I claim as new, and desire to secure by Letters Patent, is

l. A centrifugal apparatus for casting ingots, comprising a tilting support, a rotary mold journaled in said support and having IOO an extended operating-shaft, a wheel operried by said shaft, and a plurality of indeatively connected with said shaft and arpendent driving-wheels adapted to be separanged to tilt therewith vand a plurality of rately engaged by said wheel f, substantially independent driving-Wheels arranged in different positions, said Wheel on the tilting support being adapted to separately engage saiddriving-Wheels to rotate the mold, sub-o stantially as described.

2. In combination, the tilting casing or support,the plurality of rotary molds journaled therein, the driving-shaft operatively connected therewith, an operating-Wheel f car- FRANS GUSTAF STRIDSBERG.

lVitnesses ERNST SVANQVIST, E. HERMANssoN. 

